Electrochemical cell



FIG. 1 is a perspective view showing the bottom and one side of the electrochemical cell of the present invention;

FIG. 2 is a side elevational view of the electrochemical cell of the present invention;

FIG. 3 is a top plan view of the electrochemical cell of the present invention; and,

FIG. 4 is a bottom plan view of the electrochemical cell of the present invention.

The broken line showing in FIGS. 1, 2 and 4 is included for the purpose of illustrating environmental structure only and forms no part of the claimed design. 

We claim the ornamental design for an electrochemical cell, as shown in the drawing figures and described. 